The winger spent time last season at Whaddon Road and will noe rejoin the League One club for an initial one month period.
Gary Johnson said: "Jennison needs to be playing games"
"He's come back strong in pre-season but we just can't get him on to our bench at the moment. He definately has a future here but at the moment he needs to be playing first team games where three points are at stake. While he's there he will be getting closer and closer to our first team all the time."